Upon approach to the Discovery, orbiting Jupiter, Curnow and Soviet Maxim Brajlovsky, were selected for re-entering the ship. The two managed to enter through the emergency airlock, and discovered that the ship still had a breathable atmosphere. After exploring the ship, they manged to restart its main functions.

When a Monolith was discovered in orbit around Jupiter, Curnow monitored Max as he examined it in an extravehicular pod. He was also the first to notice a problem, but was unable to get Max away before his pod was destroyed.

After the mission was over, and the Leonov left Jupiter's orbit, Curnow was placed back into suspended animation.